A New Cryptosystem using Vigenere and Metaheuristics for RGB Pixel Shuffling

Abstract

Abstract-In this article we present a new approach using Vigenere and metaheuristics to resolve a problem of pixel shuffling to cipher an image. First the image is adapted to match the resolution system by transforming it to a list of intensities and coordinates. The idea is to use Vigenere encryption to maximize the confusion by widening the domain of intensities. Then, metaheuristics play the major role of encryption, generating an appropriate Meta key in order to shuffle the lists. Thus, both Vigenere key and Meta-key are used for encryption and later in decryption by the recipient. Finally, a comparison of different metaheuristics is proposed to find the most suitable one for this cryptosystemt.

New Transport Layer Security using Metaheuristics and New Key Exchange Protocol

“…2) Symmetrical Metaheuristics Ciphering Approach : Symmetrical metaheuristics ciphering is a new cipher system using Vigenere and metaheuristics [4]. The aim of the use of Vigenere encryption is to maximize the confusion and the use of metaheuristics helps generate a robust secret Meta-key.…”

“…2) TLSM record protocol : The TLSM consists of the following steps (Fig. 2 F1) is appended at the tail of C(F1), the result is encrypted by the symmetrical metaheuristics ciphering [4] using the first meta-key obtained from the handshake protocol , hence resulting in the encrypted data. 3) TLSM Key Exchange and Encryption Process : Before presenting the operations of the key exchange and encryption processes, the following adopted parameters should be defined:…”

“…Symmetrical metaheuristics ciphering [4] generates keys valid for only one session. For this matter, to encrypt a data frame using Symmetrical metaheuristics ciphering in t sessions, k t keys are required to be generated.…”

“…In order to increase the speed of new connections, in this paper the use of the recently developed symmetrical metaheuristics ciphering technique [4] is suggested in the most sensitive phase of TLS protocol. This technique helps secure messages and private keys (session keys) exchanged between the client and the server.…”